Castle Rock is a pub and brewing group based in the East Midlands and Yorkshire. It was founded in 1977 by former Campaign for Real Ale (CAMRA) chairman Chris Holmes and its first pub was The Old King's Arms in Newark.

Named "Pub Group of the Year" in 2002, 2006 and 2008, Castle Rock currently operate 20 pubs or cafe bar style establishments and have a policy of stocking cask beers from regional and micro breweries.

Castle Rock also operates Nottingham's largest full mash brewery, which
has become firmly established in local and national real beer drinking
circles.

Castle Rock produce a range of six regular cask ales and a monthly guest beer in its 'Natural Selection' range, created in conjunction with the Wildlife Trusts.

Castle Rock Brewery use only the finest ingredients available to deliver the highest quality real ales to its discerning followers.